package ch8;

public class Exercise8_1 {
    public static void main(String[] args) {
        String s1,s2,s3,s="123QWEasdZXC";
        s1 = s.toUpperCase();
        s2 = s.toLowerCase();
        s3 = s1.concat(s2);
        System.out.println(s1);
        System.out.println(s2);
        System.out.println(s3);
    }
}
